Tank trailer airfoil



FIG. 1 is a perspective upper view of a tank trailer airfoil;

FIG. 2 is a perspective lower view thereof;

FIG. 3 is a side elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is an isolated perspective upper view thereof; and,

FIG. 6 is an isolated perspective lower view thereof. 

CLAIM The ornamental design for a tank trailer airfoil, as shown and described. 